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US 11,635,598 B2Granted
Telephoto lens
AssigneeLeica Camera AG
InventorsAlexander Martin, Michael Hartmann, Sigrun Kammans
Life of this patent
Estimating the term…
Abstract
A telephoto lens having an entrance pupil of between 80 and 110 mm includes a lens head and a focusing component. The lens head, as a first optical assembly, consists of four lens elements with a refractive power sequence that alternates in the light direction. The focusing component is a second optical assembly made of at least two lens elements and has a relative aperture of between 1:4.5 and 1:7.
Claims20
A telephoto lens having an entrance pupil of between 80 and 110 mm, comprising:
- a lens head;
- and
- a focusing component, wherein
- the lens head, as a first optical assembly, consists of four lens elements with a refractive power sequence that alternates in the light direction and the focusing component is a second optical assembly made of at least two lens elements and has a aperture ratio of between 1:4.5 and 1:7, and
- two optically transparent plane plates which are perpendicular to the optical axis are introduced into the imaging ray path between the lens head and the focusing component for a mechanical separability of the optical assemblies.
2 more elements
Dependencies are inferred from the claim text.